/**
 * Copyright 2016 Yahoo Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.bookkeeper.mledger;

/**
 * JMX Bean interface for ManagedLedgerFactory stats
 */
public interface ManagedLedgerFactoryMXBean {
    /**
     * Get the number of currently opened managed ledgers on the factory
     */
    int getNumberOfManagedLedgers();

    /**
     * Get the size in byte used to store the entries payloads
     */
    long getCacheUsedSize();

    /**
     * Get the configured maximum cache size
     */
    long getCacheMaxSize();

    /**
     * Get the number of cache hits per second
     */
    double getCacheHitsRate();

    /**
     * Get the number of cache misses per second
     */
    double getCacheMissesRate();

    /**
     * Get the amount of data is retrieved from the cache in byte/s
     */
    double getCacheHitsThroughput();

    /**
     * Get the amount of data is retrieved from the bookkeeper in byte/s
     */
    double getCacheMissesThroughput();

    /**
     * Get the number of cache evictions during the last minute
     */
    long getNumberOfCacheEvictions();
}
